Title :
A scalable video compression technique based on wavelet transform and MPEG coding
Author :
Chang, Pao-Chi ; Lu, Ta-Te
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Chung-Li, Taiwan
fDate :
8/1/1999 12:00:00 AM
Abstract :
We present a scalable coding scheme based on the discrete wavelet transform (DWT) and MPEG coding for video applications. It utilizes the hierarchical pyramid structure that provides multiple resolutions. The DWT decomposes the image into several bands. In each band, a fixed-size motion compensated MPEG coder with custom-designed quantization tables and scanning direction is employed. This scheme has the advantages of reusing the widely available MPEG hardware and software as well as relieving the limitation of the image size imposed by the MPEG hardware technology. The simulation results show that the DWT-MPEG coding method improves the image quality over ordinary MPEG coding by 0.3~1.5 dB
Keywords :
code standards; data compression; discrete wavelet transforms; image reconstruction; image resolution; quantisation (signal); telecommunication standards; transform coding; video codecs; video coding; DWT-MPEG coding method; MPEG codec; MPEG coding; MPEG hardware reuse; MPEG software reuse; custom-designed quantization tables; discrete wavelet transform; fixed-size motion compensated MPEG coder; hierarchical pyramid structure; image quality; image size; multiple resolutions; reconstructed video quality; scalable coding; scalable video compression; scanning direction; simulation results; video applications; Discrete wavelet transforms; Hardware; Image coding; Quantization; Signal resolution; Spatial resolution; Streaming media; Transform coding; Video compression; Wavelet transforms;
Journal_Title :
Consumer Electronics, IEEE Transactions on
